Pre-stressed tension ring structures

#This is a substitute for application Ser. No. 593,708, filed July 7, 1975.

#This invention relates to pre-stressed tension ring structures, and has for an object thereof the provision of pre-stressed tension ring structures.

#Another object of the invention is to provide dome structures wherein roof domes are integrated with supporting wall structures.

#In the drawings:

#FIG. 1 is a fragmentary, top plan view of a dome structure including a pre-stressed tension ring structure forming one embodiment of the invention;

#FIG. 2 is an enlarged, vertical sectional view taken along line 2--2 of FIG. 1;

#Referring now in detail to the drawings, there is shown therein a pre-stressed tension ring structure forming one embodiment of the invention and also forming a part of a domed building including a tension ring 10, which is pre-tensioned, and tension ring joints 12, connecting the tension ring to a bond beam 14 to pre-stress the bond beam in compression. The bond beam 14 is a full circle ring of steel reinforced concrete and is integral with and supported by columns 16 of the dome structure.

#Each tension ring joint 12 includes a bearing plate 20 placed over anchor bolts 22 embedded in the bond beam 14, holes 24 fitting closely over the bolts. The bearing plate is supported on grout 26. A connector plate 28 has enlarged holes 30 very loosely receiving the anchor bolts 22, and also has hexagonal sockets 32 below bolt holes 34 in a plate 36 welded to the connector plate. Bolts 38 have heads 40 fitting in the hexagonal sockets 32, and extend through the holes 34. Chordal tension ring plates or bars 42, 44 and 46 have stacked or overlapping end portions with holes 48 fitting closely over the bolts 38.

#Haunch connectors 50 have base plates 52 resting on the top plate 46 with the bolts 38 extending through holes 54 in the haunch base plate. Vertical plates 56 of the haunch connectors bear against the overlapping chordal plates 42, 44 and 46 of the tension ring. Wood beams 58 are connected to abutments 60 of the haunch connectors, and are connected at their other ends by hub connectors 62 of the dome per se.